462 DRAGONFLIES FROM AUSTRALIA A^D TASMA!^IA, 



carries a large spine or tooth beneath its basal half; inferior IS 

 mm., very wide and truncated at tip, much upcurved, brown 

 bordered with black. (Plate xxiii., figs. 5-6). 



9. Total length, 60 : abdomen, 44 ; forewiiuj, 41 ; hindiviny, 

 39*5 mm. Very similar to $, but colours somewhat duller. Ab- 

 domen with 1-2 very swollen, 3 not pinched, 8-9 only slightly 

 widened, 10 narrower. Dentigerons platf of seg. 10 with nine or 

 ten closely set teeth. Appendages 1*4 mm., short, lanceolate, 

 rather thick, black. 



In the above descriptions, the colouration is probably that of 

 individuals not fully matured. 



Types in Coll. Tillyard (Cradle Mt., N.AV. Tasmania, Jan. 

 16th, 1917). 



Hab. — Cradle Mountain and Middlesex Plains districts, N.W. 

 Tasmania, altitude 2,500-4,000 feet. At the beginning of Jan- 

 uary, the insect was very immaturely coloured, and immature 

 specimens were met with right through the visit. The insect is 

 a large one, and Hies only in sunshine, and chietly in the after- 

 noons. As rain usually sets in between 2 and 3 p.m., the task 

 of obtaining sufficient food is not an easy one. AVe did not meet 

 with a single well-nourished specimen, even those that had ap- 

 parently been out longest being somewhat Habby and evidently 

 not fully coloured. 



This in.sect loves most of all to lurk in the patches of thick 

 forest-country, and, like most of the duller-coloured members of 

 the genus, it is usually to be seen resting on tree-trunks, where 

 its dull grey-brown colouration renders it quite inconspicuous. 



This species is very closely related to A. tasiiianica Tillyard, 

 from Hobart, to which it bears much the same relationship that 

 A. mi dtipn aetata Martin, does to A. parvistigma 8elys. The 

 male may be at once distinguished by lacking the immense 

 dor.sal tubercle on seg. 10, and by the inferior appendage not 

 being deeply bifid, as in A. tasmauica, but merely truncated. 

 Also the superior appendages in A. tasma?tica are somewha.t 

 longer and narrower, and less blunt at the tip, than in the new 

 species. The female of A. tasmanica is not known 



